Jade, in the meantime, you can add a whitelist entry covering the CIDR range for the country you want to allow in, then add blacklist entries for CIDR ranges covering the countries you want to block. SmarterMail will check the whitelist before checking the blacklist, so you should still be able to receive incoming email from desired countries while blocking access from the others. I know this isn't an ideal solution and can be pretty tedious, but should help clear up those brute-force attempts you're seeing originating in Russia.
Kyle Kerst
System/Network Administrator
SmarterTools Inc.
(877) 357-6278
www.smartertools.com